基于译码转发的混合星地中继网络的安全容量分析  

Secrecy outage analysis on DF-based integrated satellite-terrestrial relay networks

作　　者：陶祥帅 尹春岩 TAO Xiangshuai;YIN Chunyan(College of Telecommunications Engineering,Army Engineering University of PLA,Nanjing 210007,China;Nanjing Institute of Telecommunication Technology,Nanjing 210007,China)

机构地区：[1]陆军工程大学通信工程学院,江苏南京210007 [2]南京电讯技术研究所,江苏南京210007

出　　处：《南京邮电大学学报（自然科学版）》2019年第2期63-69,共7页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家自然科学基金(61271255)资助项目

摘　　要：针对星地融合网络的安全问题,提出了一种实现安全传输的波束形成方案。首先,基于卫星-中继链路的瞬时信道状态信息以及中继-用户链路的统计信道状态信息,以最大化安全传输速率为目标,同时满足中继最大发射功率约束,建立一个优化问题。然后,利用矩阵分析、瑞利熵理论等数学工具解决这个优化问题,从而得到最优的中继天线接收和发射权重以及中继发射功率。为了进一步分析该方案的安全性能,推导了系统的遍历安全速率的解析表达式。最后,通过仿真,证明提出的安全传输方案可有效提高网络的安全性能。Aimed at the secure transmission problems of integrated satellite terrestrial relay networks,a BF algorithm for realizing physical layer security is proposed.Firstly,an optimization problem is established to maximize the secure transmission rate while meeting the maximum transmit power constraints of the relay in the scene based on the instantaneous channel state information of satellite-relay link and the statistical channel state information of the relay-user links.Then,by using the mathematical tools for matrix analysis and Rayleigh quotient theory,the optimization problem can be solved,and the optimal relay antenna receiving and transmitting weights and the relay transmitting power are obtained.To illustrate the security performance of integrated satellite terrestrial relay networks with the scheme,the analytic expression of the ergodic secrecy rate is derived.Finally,the simulation results confirm that the proposed scheme can effectively improve the security performance of the integrated satellite terrestrial relay networks.

关 键 词：安全传输 译码转发 混合星地中继网络 性能分析 

分 类 号：TN927.23[电子电信—通信与信息系统]